coalesce cannot be used with an empty tuple

[jac4g09]

Describe the bug

When vmseries_ami_id is specified in the asg module the plan errors out.

Expected behavior

If vmseries_ami_id is specified data.aws_ami.this[0].id should be ignored.

Current behavior

│ Error: Invalid index
│ 
│   on .terraform/modules/vm_series_asg/modules/asg/main.tf line 28, in resource "aws_launch_template" "this":
│   28:   image_id      = coalesce(var.vmseries_ami_id, data.aws_ami.this[0].id)
│     ├────────────────
│     │ data.aws_ami.this is empty tuple
│ 
│ The given key does not identify an element in this collection value: the
│ collection has no elements.

Possible solution

same solution as
Issue
PR

coalesce(var.vmseries_ami_id, try(data.aws_ami.this[0].id, null) )

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[pimielowski]

@jac4g09 thanks for the info!
You are right, I test it and the problem exists there.

[jac4g09]

Thanks for the quick response 😀